第一步,调出 Persistence 窗口.
File—>Project Structure—>model—> + —>JPA
第二步:打开 Persistence窗口
配置 生成实体类的参数
如图:
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1.数据源,即链接数据库的信息,按要求填写数据库信息即可
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2.生成实体类的位置.
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3.实体类名称前缀.这里我什么都没写.
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4.实体类名称后缀. 这里我写Entity. 比如数据库表名为 user,那么生成实体类为 UserEntity
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5.选择哪些表的哪些字段生成实体类.这里我全选.
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6.生成的实体类自动添加 JPA注解.
最后点击ok,就能在我们的项目下看到生成的实体类
如:
package com.itguang.weixinsell.entity; import javax.persistence.Basic; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Table; import java.sql.Timestamp; /** * @author itguang * @create 2017-11-25 14:02 **/ @Entity @Table(name = "product_category", schema = "sell", catalog = "") public class ProductCategoryEntity { private int categoryId; private String categoryName; private int categoryType; private Timestamp createTime; private Timestamp updateTime; @Id @Column(name = "category_id") public int getCategoryId() { return categoryId; } public void setCategoryId(int categoryId) { this.categoryId = categoryId; } @Basic @Column(name = "category_name") public String getCategoryName() { return categoryName; } public void setCategoryName(String categoryName) { this.categoryName = categoryName; } @Basic @Column(name = "category_type") public int getCategoryType() { return categoryType; } public void setCategoryType(int categoryType) { this.categoryType = categoryType; } @Basic @Column(name = "create_time") public Timestamp getCreateTime() { return createTime; } public void setCreateTime(Timestamp createTime) { this.createTime = createTime; } @Basic @Column(name = "update_time") public Timestamp getUpdateTime() { return updateTime; } public void setUpdateTime(Timestamp updateTime) { this.updateTime = updateTime; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; ProductCategoryEntity that = (ProductCategoryEntity) o; if (categoryId != that.categoryId) return false; if (categoryType != that.categoryType) return false; if (categoryName != null ? !categoryName.equals(that.categoryName) : that.categoryName != null) return false; if (createTime != null ? !createTime.equals(that.createTime) : that.createTime != null) return false; if (updateTime != null ? !updateTime.equals(that.updateTime) : that.updateTime != null) return false; return true; } @Override public int hashCode() { int result = categoryId; result = 31 * result + (categoryName != null ? categoryName.hashCode() : 0); result = 31 * result + categoryType; result = 31 * result + (createTime != null ? createTime.hashCode() : 0); result = 31 * result + (updateTime != null ? updateTime.hashCode() : 0); return result; } }